Log Message:
Update to 2015.8.1

Changelogs from 2014.7.2:
https://docs.saltstack.com/en/develop/topics/releases/2015.8.1.html
https://docs.saltstack.com/en/develop/topics/releases/2015.8.0.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.6.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.5.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.4.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.3.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.2.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.1.html
https://docs.saltstack.com/en/develop/topics/releases/2015.5.0.html
https://docs.saltstack.com/en/develop/topics/releases/2014.7.6.html
https://docs.saltstack.com/en/develop/topics/releases/2014.7.5.html
https://docs.saltstack.com/en/develop/topics/releases/2014.7.4.html
https://docs.saltstack.com/en/develop/topics/releases/2014.7.3.html